How is anyone seeing what bitbook did is right?

Thats pure insanity.

The guy emailed another reputable company with his findings, for this very reason.  Bitbook gets butt hurt because he found a serious flaw, and auto accuses him of scamming and threatens to hold his coins. 

It's pretty cut and dry.  Bitbook fucked up, then they want to punish OP for it.

It is NOT OP's job to help them fix a site bug.  Can bitbook freeze or ban his account?  Sure.  Thats their choice.  Thats fine.  But to keep his coins.  NEVER is that right, ever.  Bitbook can guess at his intent, but I tend to think that since he PM'd all the info to a third party, reputable company, before proceeding, that he was trying to test to see if the site had a clear security leak, or if it would be noticed.

We will never know if the OP wouldd have kept the coins.  But think on this:

If he wanted to keep the coins, wouldnt he have loaded him one account, made all kinds of bets, then transferred them to one other account and cashed out?  What he did makes absolutely no sense for a scammer to do. 

All you people who are saying you respect and are now a customer of bitbook for life after this are insane.  They handled this piss poorly.

OP, glad you got your coins back.  I see what you tried to do.  It's what any person who tests sites for flaws would do.  Obviously these people here have no idea what bug testing is for.  Good on you sir.